System and method for processing weather information

Weather information provided to a system for processing is converted from a weather information source coordinate system to a three-dimensional XYZ coordinate system. Processing of the weather information, e.g., to determine a current location and predicted path of weather phenomena, and to determine geographic locations which are or may be affected by the weather phenomena, is accomplished in the three-dimensional XYZ coordinate system. Locations in the three-dimensional XYZ coordinate system may be converted to two-dimensional screen xy coordinates for the display of weather phenomena indications over a geographic map display without converting the weather phenomena locations to a latitude/longitude coordinate system.